Hello, Femilon is combined OCP and is used both in regularizing menstrual cycle and prevention of unwanted pregnancy. So, continue above prescribed medication as per your doctor recommendation. It has several side effects but quite tolerable in scheduled doses and include dizziness, lack of energy, drowsines, headache and sweating etc along with some GI effects like nausea, vomiting, diarrhea, epigastric fullness and gastric irritation. Avoid stress, take healthy diet with iron supplements, control body wt and need proper sleeping. Be well.